Many case of citrus fruit trees can be grown indoors , include Citrus paradisi ( Citrusxparadisi , USDA zones 9 to 11 ) , which is a intercrossed character of citrus tree . In cooler climates , they can be overwintered indoors or kept as a houseplant year round .
Varieties for Grapefruit Trees Indoors
If you require to get citrus trees indoors , * * it is best to buy grafted dwarfvarietiesthat have maximum pinnacle of approximately 6 feet ; a full - sized Sir Herbert Beerbohm Tree can be up to 30 feet tall . * * These varieties set fruit , just like larger tree .
The oroblanco grapefruit ( Citrus grandis OsbeckxC. ParadisiMacf . , zones 9 to 11 ) , which acquire fruit with blanched physique , is a good option for originate indoors .
Tip
The specie abbreviation " Macf . " used for the oroblanco cultivar announce a species description by fete prof and botanist John M. Macfarlane .
Most dwarf citrus plant life are ego - fruitful , meaning they do not need to be cross-pollinate by a different mixture to make yield . However , because citrus tree go on indoors year round may not be expose to pollinator , you may want to use a paintbrush to change pollen from the flower stamens to the pistil to ensure pollination .
Indoor Grapefruit Tree Culture
Let ’s take a looking at the idealistic environment for rise Citrus paradisi and other citrus trees indoors .
Growing Medium
Grapefruit trees rise honorable in potting ground that has a pH between 6 and 7 , which is slightly acidic . Cactus pot mix works well for these trees .
Well - drain soil is key , so check that the container you use has enough drainage holes on the bottom of the pot to prevent soil from becoming soggy .
Light
Indoor citrus tree need sunlight , just like outdoor citrus tree plant do . If you do n’t have a sun lounge or a solarium in your home , * * keep your grapefruit tree near a west or south - facing windowpane where it will take in at least five to six hours of sunlight a day . * * you’re able to use rise visible light to ensure the tree is receiving enough light .
Temperature
Temperatures between 55 and 85 ° F are ideal for growing Citrus paradisi trees indoors . Citrus tree like a 10 ° remainder in day and nighttime temperatures .
Caring for Indoor Grapefruit Trees
Just like outside grapefruit trees , indoor potted plants need H2O and fertilizer . lease ’s go overthe needsof these tree .
Moisture
Indoor Citrus paradisi trees should be watered once a hebdomad . When the top of the filth looks or feels teetotal to the touch , it is metre to water . Deep lachrymation are honest than shallow waterings . forefend overwatering , however , which have root word rot .
In addition to right watering , indoor grapefruit trees also need stack of humidity . Alternatively , you could use a spray feeding bottle filled ideally with rainwater to mist your plant life every day . you’re able to also heap your grapefruit Sir Herbert Beerbohm Tree container on top of a brick localise on a tray of lactating pebbles . This helps upgrade humidity while keep up beneficial drain .
The right amount of moisture for an indoor citrus tree , including Citrus paradisi , is an important part of indoor care . fend off overwatering , but seek to provide a unbendable state of humidity .
Fertilizer
During the natural spring and summer month , fertilize indoor citrus trees every three weeks with a 3 - 1 - 1 rule , which think of it contains more atomic number 7 than K or phosphorus . In the fall and wintertime , fertilize plant life every six weeks .
Pests
Like many indoor industrial plant , Citrus paradisi trees develop inside in container can attract cuss , including spider mites , aphids , whitefly , mealybugs and scale of measurement . Insecticidal grievous bodily harm can be used to keep these pests at bay and dominance plague .
Moving Grapefruit Trees Outdoors
When outside temperature reach 50 ° F in your area , you could move your Citrus paradisi tree outdoors , if you wish . The leaves of a Citrus paradisi Sir Herbert Beerbohm Tree that is exposed to full sun too apace may singe , so acclimatise the tree by keeping it in partial shade for one or two workweek before moving it into full sunshine .
When nighttime temperature drop below 40 ° F , it ’s time to move the tree back indoors .
